iPod touch jailbreak problems

So I have a 2g mc model iPod touch. It was ios 4.0, but then I downgraded to 3.1.2 and jailbroke it using spirit. Everything is fine until I try and download an app from the app store. It says "application requires iPhone 3.1.3 update" or something like that. Is there any way to update to 3.1.3 and keep all my jailbroken apps and stuff like that.thanks in advance.

iPod, iPhone, iPad Jailbreak and Downgrade from IOS 4 to 3.1.3

no you cant update and keep what you have.......... what you need to do is first open itunes do a restore like its back to its origonal if it goes back to 4.0 thats fine then

This is a tutorial on how to downgrade your iPhone, or iPod Touch to 3.1.3.

Step 1: Connect to Computer, and turn iPhone/iTouch power off.Step 2: Hold both Home+Power buttons for about 10 seconds, then release the Power button but continue holding the Home button until your computer recognizes it.Step 3: (MAC users) Hold the Option button and click Restore. Then locate the 3.1.3 firmware you downloaded. (WIN users) Hold Shift and click Restore. Then locate the 3.1.3 firmware you downloaded. Let it restore your iPhone or iTouch to 3.1.3 or lower, which may take up to 10-15 minutes. When completed you should get an error message.Step 4: Use the program you can download below, and click Exit Recovery Mode.Step 5: Let your iPhone or iTouch activate in iTunes, then if needed, Restore from old backups.

Once you do this and you have 3.1.3 on your ipod, iphone, ipad Open spirit and let it do its thing after it gets done you then should have Cydia on there there will be 2 things you need to get after all that is done 1, hackulo.us 2,Installous

If you want to get free apps for the iPhone or iPod Touch, you must first have your iPhone or iPod Touch jailbroken. After that, simply get on Cydia and add the Hackulous repository;

Cydia -> Manage -> Sources -> Edit -> Add

Enter the link “http://cydia.hackulo.us” like the picture below.free-iphone-apps-hackulous[1].jpgAfter adding the source for the Hackulous repository to cydia, the next step is to download the Installous app for the iPhone or iPod Touch. The Installous app will be your source for apps.

Cydia -> manage -> Packages

From there whether you want to perform a search function or just scroll down and find it, you will have to install the Installous app. The Installous app will be like an alternative to the iPhone app store.

free-iphone-apps-installulous[1].jpgOnce the Installous app is on your springboard, you can use it to find the many apps that are available for the iPhone and iPod Touch. The app will often redirect you to hosting sites via the browser but from there just simply select a mirror and you should be able to enjoy the appsfree.

Option #1
SFTP into your iPhone and backup all apps you've installed via Cydia that are in the directory above.
Also backup the folder called "apt" in /private/etc/
Restore Pwned firmware or new firmware them QuickPwn it, and SFTP in and copy back your apps and the "apt" folder to their correct directories and let Cydia update everything.

Option #2
You can install "AptBackup" (use Cydia and search for it) and it will backup a list of al the apps you've installed via Cydia. That list then gets backed up when you do a normal backup to iTunes. Then after you have to restore your iPhone, use AptBackup to restore the list and Cydia will install them all back at the same time.

Keep in mind that AptBackup only makes a list of your 3rd party apps. And does NOT back up the actual app. So in other words, you will lose any settings to those apps. It's better than nothing.

There is no way to backup unofficial applications. You can place o your computer via SSH and replace them after a restore, but they will have the wrong permissions and will not launch. AptBackup only makes a list of your apps, and AppBackup only backs app data, not the app itself.

I use a combination of itunes restore and Rock restore.
Once you install Rock and set up a user account, Rock will automatically create backups of your non-apple apps. When I restore, I run the itunes backup then the Rock backup. Just about everything comes back except custom themes.